Hillhead 2012
19 - 21 June 2012
International live demonstration show for the quarrying, recycling and heavy construction industries at Hillhead Quarry, Buxton, UK.
plug and feather
A technique for splitting stone, by which split wedges (feathers) are hammered into a line of holes and pressure exerted on the stone by inserting chisels (plugs) into the feathers.
The monthly journal for the quarry products industry.